Applying online patch on 11gr2

在Oracle 11g中提出了online patch(也叫hot patch)的特性；Hot patching允许我们在实例始终在线的情况下安装，启用或禁用一个修复补丁或者诊断补丁。针对7*24在线的业务系统，hot patch为我们提供了一条既能避免当机时间而又可以实施补丁的途径。在Oracle 11g中我们可以使用Opatch命令行工具针对任意数据库实施在线补丁(前提是该补丁是一个hot patch)。一般来说在线补丁(hot patches)只能是那些代码修改范围小且复杂度很低的补丁，举例来说它们往往是一些诊断补丁(diagnostic patches)或者小bug的修复(small bug fixes)。值得注意的是hot patching将需要消耗额外的内存，决定其消耗内存数量的因素是:1.补丁本身的大小,2.实例中的进程总数；举例来说某个补丁的大小正好为一个OS page的大小(一般为4kB)，那么当实例中运行的进程总数为1000时，则该hot patching所额外消耗的内存总数为4kB*1000=4MB。 hot patches与常规Conventional patches对比具有可在线实施和安装快的特性，如下图: 在实际生产环境中，相信没有多少朋友实施过hot patching，一来国内目前还没有普及11g的使用，二来hot patching的数量在所有interim patch中只占极少数；一直以来都想写这样一篇关于hot patching的博文，唯一妨碍我写作的问题是在11.2.0.1下找不到可实施的online interim patch；以MOS->patches&upgrade目前的分类我们很难找出某个base release下可用的hot patch，当然这并不妨碍补丁专栏的使用。为了这个令人郁闷的问题，我特意去提交了一个Service Request，得到的回复:

I have tried to find the patches which support online patching on 11.2.0.1 version,
but I also can not find them because there are too many patches and there is no catalog for the patches
which support online patching, and I can only check the patch readme to confirm whether that patch supports online patching.

I found one patch which supports online patching, but this patch is for 11.2.0.2 version.
The patch no. is 10188727.

Sorry for the inconvenience brought to you. Hope the above update can help you.
If the above patch is not what you want, then please update the SR and I will continue for your issue.

这其中提到的patch 10188727，可以从Note<RDBMS Online Patching Aka Hot Patching [ID 761111.1]>中找到，另外一个可找到的hot patch是11.1.0.6上的 6198642< DUMMY PATCH FOR TESTING DB11 PATCHING>，不过很可惜该补丁只有Linux x86一个平台版本的。所以我不得不先将11.2.0.1的测试库升级到了11.2.0.2上:

SQL> select * from v$version;

BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
PL/SQL Release 11.2.0.2.0 - Production
CORE    11.2.0.2.0      Production
TNS for Linux: Version 11.2.0.2.0 - Production
NLSRTL Version 11.2.0.2.0 - Production

[maclean@rh2 OPatch]$ ps -ef|grep pmon|grep -v grep
maclean  22481     1  0 19:19 ?        00:00:00 ora_pmon_PROD

[maclean@rh2 OPatch]$ pmap -d 22481
22481:   ora_pmon_PROD
Address           Kbytes Mode  Offset           Device    Mapping
0000000000400000  180232 r-x-- 0000000000000000 008:00002 oracle
000000000b602000    1820 rwx-- 000000000b002000 008:00002 oracle
000000000b7c9000     300 rwx-- 000000000b7c9000 000:00000   [ anon ]
000000000dbef000     436 rwx-- 000000000dbef000 000:00000   [ anon ]
0000000060000000 2050048 rwxs- 0000000000000000 000:00009   [ shmid=0x550001 ]
0000003e09a00000     112 r-x-- 0000000000000000 008:00001 ld-2.5.so
0000003e09c1b000       4 r-x-- 000000000001b000 008:00001 ld-2.5.so
0000003e09c1c000       4 rwx-- 000000000001c000 008:00001 ld-2.5.so
0000003e09e00000    1336 r-x-- 0000000000000000 008:00001 libc-2.5.so
0000003e09f4e000    2044 ----- 000000000014e000 008:00001 libc-2.5.so
0000003e0a14d000      16 r-x-- 000000000014d000 008:00001 libc-2.5.so
0000003e0a151000       4 rwx-- 0000000000151000 008:00001 libc-2.5.so
0000003e0a152000      20 rwx-- 0000003e0a152000 000:00000   [ anon ]
0000003e0a200000     520 r-x-- 0000000000000000 008:00001 libm-2.5.so
0000003e0a282000    2044 ----- 0000000000082000 008:00001 libm-2.5.so
0000003e0a481000       4 r-x-- 0000000000081000 008:00001 libm-2.5.so
0000003e0a482000       4 rwx-- 0000000000082000 008:00001 libm-2.5.so
0000003e0a600000       8 r-x-- 0000000000000000 008:00001 libdl-2.5.so
0000003e0a602000    2048 ----- 0000000000002000 008:00001 libdl-2.5.so
0000003e0a802000       4 r-x-- 0000000000002000 008:00001 libdl-2.5.so
0000003e0a803000       4 rwx-- 0000000000003000 008:00001 libdl-2.5.so
0000003e0aa00000      88 r-x-- 0000000000000000 008:00001 libpthread-2.5.so
0000003e0aa16000    2044 ----- 0000000000016000 008:00001 libpthread-2.5.so
0000003e0ac15000       4 r-x-- 0000000000015000 008:00001 libpthread-2.5.so
0000003e0ac16000       4 rwx-- 0000000000016000 008:00001 libpthread-2.5.so
0000003e0ac17000      16 rwx-- 0000003e0ac17000 000:00000   [ anon ]
0000003e0ae00000      28 r-x-- 0000000000000000 008:00001 librt-2.5.so
0000003e0ae07000    2048 ----- 0000000000007000 008:00001 librt-2.5.so
0000003e0b007000       4 r-x-- 0000000000007000 008:00001 librt-2.5.so
0000003e0b008000       4 rwx-- 0000000000008000 008:00001 librt-2.5.so
0000003e0da00000      84 r-x-- 0000000000000000 008:00001 libnsl-2.5.so
0000003e0da15000    2044 ----- 0000000000015000 008:00001 libnsl-2.5.so
0000003e0dc14000       4 r-x-- 0000000000014000 008:00001 libnsl-2.5.so
0000003e0dc15000       4 rwx-- 0000000000015000 008:00001 libnsl-2.5.so
0000003e0dc16000       8 rwx-- 0000003e0dc16000 000:00000   [ anon ]
00002abec920e000       8 rwx-- 00002abec920e000 000:00000   [ anon ]
00002abec9210000       4 r-x-- 0000000000000000 008:00002 libodmd11.so
00002abec9211000    1024 ----- 0000000000001000 008:00002 libodmd11.so
00002abec9311000       4 rwx-- 0000000000001000 008:00002 libodmd11.so
00002abec9312000     360 r-x-- 0000000000000000 008:00002 libcell11.so
00002abec936c000    1020 ----- 000000000005a000 008:00002 libcell11.so
00002abec946b000      36 rwx-- 0000000000059000 008:00002 libcell11.so
00002abec9474000       4 rwx-- 00002abec9474000 000:00000   [ anon ]
00002abec9475000     848 r-x-- 0000000000000000 008:00002 libskgxp11.so
00002abec9549000    1024 ----- 00000000000d4000 008:00002 libskgxp11.so
00002abec9649000       8 rwx-- 00000000000d4000 008:00002 libskgxp11.so
00002abec9665000       4 rwx-- 00002abec9665000 000:00000   [ anon ]
00002abec9666000    2580 r-x-- 0000000000000000 008:00002 libnnz11.so
00002abec98eb000    1020 ----- 0000000000285000 008:00002 libnnz11.so
00002abec99ea000     264 rwx-- 0000000000284000 008:00002 libnnz11.so
00002abec9a2c000       8 rwx-- 00002abec9a2c000 000:00000   [ anon ]
00002abec9a2e000      96 r-x-- 0000000000000000 008:00002 libclsra11.so
00002abec9a46000    1020 ----- 0000000000018000 008:00002 libclsra11.so
00002abec9b45000       4 rwx-- 0000000000017000 008:00002 libclsra11.so
00002abec9b46000       4 rwx-- 00002abec9b46000 000:00000   [ anon ]
00002abec9b47000     136 r-x-- 0000000000000000 008:00002 libdbcfg11.so
00002abec9b69000    1020 ----- 0000000000022000 008:00002 libdbcfg11.so
00002abec9c68000       8 rwx-- 0000000000021000 008:00002 libdbcfg11.so
00002abec9c6a000    6832 r-x-- 0000000000000000 008:00002 libhasgen11.so
00002abeca316000    1020 ----- 00000000006ac000 008:00002 libhasgen11.so
00002abeca415000     136 rwx-- 00000000006ab000 008:00002 libhasgen11.so
00002abeca437000      24 rwx-- 00002abeca437000 000:00000   [ anon ]
00002abeca43d000       8 r-x-- 0000000000000000 008:00002 libskgxn2.so
00002abeca43f000    1020 ----- 0000000000002000 008:00002 libskgxn2.so
00002abeca53e000       4 rwx-- 0000000000001000 008:00002 libskgxn2.so
00002abeca53f000       4 rwx-- 00002abeca53f000 000:00000   [ anon ]
00002abeca540000     656 r-x-- 0000000000000000 008:00002 libocr11.so
00002abeca5e4000    1020 ----- 00000000000a4000 008:00002 libocr11.so
00002abeca6e3000      12 rwx-- 00000000000a3000 008:00002 libocr11.so
00002abeca6e6000     628 r-x-- 0000000000000000 008:00002 libocrb11.so
00002abeca783000    1024 ----- 000000000009d000 008:00002 libocrb11.so
00002abeca883000       8 rwx-- 000000000009d000 008:00002 libocrb11.so
00002abeca885000      44 r-x-- 0000000000000000 008:00002 libocrutl11.so
00002abeca890000    1020 ----- 000000000000b000 008:00002 libocrutl11.so
00002abeca98f000       4 rwx-- 000000000000a000 008:00002 libocrutl11.so
00002abeca990000       4 rwx-- 00002abeca990000 000:00000   [ anon ]
00002abeca991000       4 r-x-- 0000000000000000 008:00001 libaio.so.1.0.1
00002abeca992000    2044 ----- 0000000000001000 008:00001 libaio.so.1.0.1
00002abecab91000       4 rwx-- 0000000000000000 008:00001 libaio.so.1.0.1
00002abecab92000      16 rwx-- 00002abecab92000 000:00000   [ anon ]
00002abecab96000      20 r-x-- 0000000000000000 008:00001 libnuma.so.1
00002abecab9b000    2044 ----- 0000000000005000 008:00001 libnuma.so.1
00002abecad9a000       4 rwx-- 0000000000004000 008:00001 libnuma.so.1
00002abecad9b000    1280 rwx-- 00002abecad9b000 000:00000   [ anon ]
00002abecaef5000      40 r-x-- 0000000000000000 008:00001 libnss_files-2.5.so
00002abecaeff000    2044 ----- 000000000000a000 008:00001 libnss_files-2.5.so
00002abecb0fe000       4 r-x-- 0000000000009000 008:00001 libnss_files-2.5.so
00002abecb0ff000       4 rwx-- 000000000000a000 008:00001 libnss_files-2.5.so
00002abecb100000    1700 rwx-- 00002abecb100000 000:00000   [ anon ]
00002abecb2a9000      28 rwx-- 0000000000000000 000:00011 zero
00002abecb2b0000      64 rwx-- 0000000000000000 000:00011 zero
00002abecb2c0000      64 rwx-- 0000000000000000 000:00011 zero
00002abecb2d0000      64 rwx-- 0000000000000000 000:00011 zero
00002abecb2e0000      64 rwx-- 0000000000000000 000:00011 zero
00002abecb2f0000      64 rwx-- 0000000000000000 000:00011 zero
00002abecb300000     164 rwx-- 0000000000057000 000:00011 zero
00002abecb329000       8 rwx-- 00002abecb329000 000:00000   [ anon ]
00002abecb32b000       4 rwxs- 0000000000000000 008:00002 hc_PROD.dat
00002abecb32c000      40 r-x-- 0000000000000000 008:00002 libnque11.so
00002abecb336000    1020 ----- 000000000000a000 008:00002 libnque11.so
00002abecb435000       4 rwx-- 0000000000009000 008:00002 libnque11.so
00002abecb436000    1048 rwx-- 00002abecb436000 000:00000   [ anon ]
00007fff3342d000      84 rwx-- 00007ffffffea000 000:00000   [ stack ]
ffffffffff600000    8192 ----- 0000000000000000 000:00000   [ anon ]
mapped: 2291488K    writeable/private: 7840K    shared: 2050052K

[maclean@rh2 ~]$  cd $ORACLE_HOME/OPatch
[maclean@rh2 OPatch]$ unzip p10188727_112020_Linux-x86-64.zip
Archive:  p10188727_112020_Linux-x86-64.zip
   creating: 10188727/
   creating: 10188727/files/
   creating: 10188727/files/lib/
   creating: 10188727/files/lib/libserver11.a/
  inflating: 10188727/files/lib/libserver11.a/kkopq.o
   creating: 10188727/etc/
   creating: 10188727/etc/config/
  inflating: 10188727/etc/config/inventory.xml
  inflating: 10188727/etc/config/actions.xml
  inflating: 10188727/etc/config/deploy.xml
   creating: 10188727/etc/xml/
  inflating: 10188727/etc/xml/GenericActions.xml
  inflating: 10188727/etc/xml/ShiphomeDirectoryStructure.xml
  inflating: 10188727/README.txt
   creating: 10188727/online/
   creating: 10188727/online/files/
   creating: 10188727/online/files/hpatch/
  inflating: 10188727/online/files/hpatch/bug10188727.pch
   creating: 10188727/online/etc/
   creating: 10188727/online/etc/config/
  inflating: 10188727/online/etc/config/inventory.xml
  inflating: 10188727/online/etc/config/actions.xml
  inflating: 10188727/online/etc/config/deploy.xml
   creating: 10188727/online/etc/xml/
  inflating: 10188727/online/etc/xml/GenericActions.xml
  inflating: 10188727/online/etc/xml/ShiphomeDirectoryStructure.xml

[maclean@rh2 OPatch]$ opatch query 10188727 -all
Invoking OPatch 11.2.0.1.1

Oracle Interim Patch Installer version 11.2.0.1.1
Copyright (c) 2009, Oracle Corporation.  All rights reserved.

Oracle Home       : /s01/product/11.2.0/dbhome_2
Central Inventory : /s01/oraInventory
   from           : /etc/oraInst.loc
OPatch version    : 11.2.0.1.1
OUI version       : 11.2.0.2.0
OUI location      : /s01/product/11.2.0/dbhome_2/oui
Log file location : /s01/product/11.2.0/dbhome_2/cfgtoollogs/opatch/opatch2011-02-17_20-05-21PM.log

Patch history file: /s01/product/11.2.0/dbhome_2/cfgtoollogs/opatch/opatch_history.txt

--------------------------------------------------------------------------------
 Patch created on 2 Dec 2010, 01:44:13 hrs PST8PDT
 Need to shutdown Oracle instances: true
 Patch is roll-backable: true
 Patch is a "Patchset Update": false
 Patch is a rolling patch: true
 Patch has sql related actions: false
 Patch is an online patch: false
 Patch is a portal patch: false
 Patch is an "auto-enabled" patch: false

 List of platforms supported:
   226: Linux x86-64

 List of bugs to be fixed:
   10188727: AFTER UPGRADING TO 11.2.0.2 SOME SQLS FAIL WITH ORA-7445 [KKEIDC()+180] ERROR

 This patch is a "singleton" patch.

 This patch belongs to the "db" product family

 List of executables affected:
   ORACLE_HOME/bin/oracle

 List of optional components:
   oracle.rdbms:  11.2.0.2.0

 List of optional actions:
   Update /s01/product/11.2.0/dbhome_2/lib/libserver11.a with /kkopq.o
   cd /s01/product/11.2.0/dbhome_2/rdbms/lib
     ; make -f ins_rdbms.mk ioracle ORACLE_HOME=/s01/product/11.2.0/dbhome_2

  Possible XML representation of the patch:

     10188727

--------------------------------------------------------------------------------
OPatch succeeded.

[maclean@rh2 OPatch]$ ./opatch query -is_online_patch 10188727
Invoking OPatch 11.2.0.1.1

Oracle Interim Patch Installer version 11.2.0.1.1
Copyright (c) 2009, Oracle Corporation.  All rights reserved.

Oracle Home       : /s01/product/11.2.0/dbhome_2
Central Inventory : /s01/oraInventory
   from           : /etc/oraInst.loc
OPatch version    : 11.2.0.1.1
OUI version       : 11.2.0.2.0
OUI location      : /s01/product/11.2.0/dbhome_2/oui
Log file location : /s01/product/11.2.0/dbhome_2/cfgtoollogs/opatch/opatch2011-02-17_19-45-33PM.log

Patch history file: /s01/product/11.2.0/dbhome_2/cfgtoollogs/opatch/opatch_history.txt

--------------------------------------------------------------------------------
 Patch is an online patch: false

OPatch succeeded.

/* 虽然Opatch返回"online patch: false"，但实际上这是一个online patch,
    造成以上问题的原因可能是Opatch版本低 */

[maclean@rh2 OPatch]$ tree 10188727
10188727
|-- README.txt
|-- etc
|   |-- config
|   |   |-- actions.xml
|   |   |-- deploy.xml
|   |   `-- inventory.xml
|   `-- xml
|       |-- GenericActions.xml
|       `-- ShiphomeDirectoryStructure.xml
|-- files
|   `-- lib
|       `-- libserver11.a
|           `-- kkopq.o
`-- online
    |-- etc
    |   |-- config
    |   |   |-- actions.xml
    |   |   |-- deploy.xml
    |   |   `-- inventory.xml
    |   `-- xml
    |       |-- GenericActions.xml
    |       `-- ShiphomeDirectoryStructure.xml
    `-- files
        `-- hpatch
            `-- bug10188727.pch

/* 可以从以上目录结构中看到包含了online子目录，我们可以直接观察其inventory.xml信息文件 */

[maclean@rh2 OPatch]$ cat 10188727/online/etc/config/inventory.xml |grep instance
 <instance_shutdown>false</instance_shutdown>
 <instance_shutdown_message></instance_shutdown_message>

/* 以上instance_shutdown为false说明其可以作为online patch实施 */

[maclean@rh2 OPatch]$ cd 10188727

/* opatch online patching的具体语法如下 */
opatch apply online -connectString